clj-bigml - BigML offers a REST-style service for building, sharing, and evaluating machine learning models. Currently the only model variety supported is CART-style decision trees grown in an anytime, streaming fashion. The trees use standard ML practices such as information gain (or information gain ratio) for classification problems, squared error for regression, and statistical pruning options.

Clojure Enclog: Clojure wrapper for the encog (v3) machine-learning framework. Encog has been around for almost 5 years, and so can be considered fairly mature and optimised. Apart from neural-nets, version 3 introduced SVM and Bayesian classification. With this library, which is a thin wrapper around encog, you can construct and train many types of neural nets in less than 10 lines of pure Clojure code.

FungGP: A genetic programming library for Clojure Genetic programming (GP) is the process of evolving computer programs using a process inspired by biological evolution. In GP, a computer program automatically writes new computer programs (in this case, by generating trees of new Clojure code), and judges them according to their ability to solve a problem or produce correct output. In fungp, like in many GP systems, tree structures representing programs go through processes inspired by biological evolution, such as mutation and reproduction. Their chance of reproduction is decided by their "fitness," which is assigned by a fitness function. For example, a simple problem you might solve with GP is symbolic regression, in which the evolved trees represent mathematical functions mapping one or more inputs to an output, and the fitness function would compile and run the evolved programs on known data to test whether sets of inputs produce correct output.

Clatrix - Clatrix works as an implementation of core.matrix so it is fully compatible with other libraries and tools that use the core.matrix API.Being implemented as a data type around the native BLAS hooks of jblas gives it speed. Being implemented as a Clojure sequence makes it clever.